Calculate vector norm in Simulink?

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Joshua
Joshua 2013-4-8
评论： Steven Crews 2021-4-21
Is there a block that finds the norm of a vector in simulink? I haven't found the equivalent to norm(v) from MATLAB.
Thanks!

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采纳的回答

Jon
Jon 2013-4-8
You can use the dot product block (with the same vector wired to both inputs) followed by a square root. Both are under the Math Operations library. I think the previously suggested abs block computes the absolute values of each element of the input vector.

更多回答（4 个）

DEBASISH MISHRA
DEBASISH MISHRA 2019-8-9
Hi,
You may direct use matrix 1-norms from dsp tool box.
Thanks
Youssef Khmou
Youssef Khmou 2013-4-8
hi, it does exist, its called "abs" , open Simulink library and go to :"Math operations" block , its the first on the list, with notation u : ABS
  2 个评论
Jon
Jon 2013-4-8
As noted in my alternative answer, I don't this this gives you what you want. As far as I can tell abs gives the element wise absolute values, not the norm
Steven Crews
Steven Crews 2021-4-21
Agreed. This is not the correct answer.

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Joshua
Joshua 2013-4-8
Thanks!
Youssef Khmou
Youssef Khmou 2013-4-8
hi, if the first answer does not work, you can use other ways, like :
1) go to " User Defined Functions" in Simulink Block .
2) choose "f(u)" FCN, add it to your file , right click on it you will find the default value :
sin(u(1)*exp(2.3*(-u(2))))
change it to
"norm(u)"
  4 个评论
显示 2更早的评论
Jon
Jon 2013-4-9
I couldn't find and "Embeded function" Do you mean the Interpreted MATLAB Fcn under User Defined Functions? The Interpreted MATLAB Fcn works, but I would guess that the dot product block, followed by the sqrt block is faster, because it doesn't need to be interpreted.

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